New Delhi , India -LRB- CNN -RRB- -- A U.S. federal air marshal may have violated Indian law after failing to properly secure his law enforcement equipment when inside the country , U.S. officials said Friday .

The equipment brought into India included two pistol magazines and ammunition -- items the U.S. Transportation Security Administration says air marshals are supposed to secure as they enter another country .

`` TSA is investigating this incident and working with Indian government officials to ensure that the facts of this incident are thoroughly reviewed , '' federal officials said in a statement issued from the TSA by the U.S. Embassy in New Delhi .

Delhi police did not confirm that a U.S. air marshal was part of the investigation , but P.N. Aggarwal , the joint commissioner of Delhi police , said that `` quite a few rounds -LRB- of ammunition -RRB- and two magazines '' were discovered inside an air-conditioning duct in a hotel room .

The description matched TSA 's of the equipment was `` not secured properly '' by an air marshal in India .

The found items led to an uncomfortable encounter for three Italians visiting India -- they were the last people to occupy the hotel room before the ammunition and magazines were found .

The Italians had traveled on to Mumbai by the time the items were discovered and were called back to Delhi to talk with police . `` They were allowed to go , '' Aggarwal said , after investigators found `` no evidence '' against them .

Neither Indian nor U.S. officials released the names of the Italians or the federal air marshal . Although Indian officialswould not confirm whether an air marshal was a suspect in the case , U.S. officials were more forthright .

`` On June 1st , TSA was made aware of a situation regarding the failure of a Federal Air Marshal to properly secure his law enforcement equipment when entering India , '' the TSA statement said . `` The equipment included two pistol magazines and ammunition , which is consistent with duty equipment issued to Federal Air Marshals for duty carry . ''

`` The Federal Air Marshal Service takes such incidents seriously ; agency policy requires Federal Air Marshals to adhere to international agreements to secure their law enforcement equipment when entering a foreign country . Federal Air Marshals found to have violated these agreements are subject to the full range of disciplinary measures up to and including removal . ''

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CNN 's Harmeet Shah Singh and Drew Griffin contributed to this report

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Indian officials first questioned Italians who had been last to stay in room

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Indian officials did not confirm air marshal was suspect

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U.S. officials said they were working with Indians on incident